Secure Authentication中的主题 SE050 - GPIO usage

SE050 - GPIO usage

SaschaH — Mon, 07 Mar 2022 11:15:59 GMT

Hello,

I looked into the datasheet of the SE050 device.

Two Pins in package are marked as GPIO pins. Can they only be used in context to ISO7816? Are there any informations available if they can be used as normal GPIO? I am interested in a path for a direct alarm trigger input.

Thanks

Sascha

Re: SE050 - GPIO usage

Kan_Li — Tue, 08 Mar 2022 02:56:39 GMT

Hi @SaschaH ,

Are you referring to IO1 and IO2? Actually they can also be used as I2C Master interface for the Sensor/Actuator use case as described in AN12449(https://www.nxp.com/docs/en/application-note/AN12449.pdf ), but they can not be used as GPIO.

In case you would like to control a GPIO via the middleware you have to connect the device with an I2C-bus I/O expander and follow the cases mentioned in AN12449.

Hope that makes sense,

Have a great day,
Kan

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!
- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-------------------------------------------------------------------------------

Re: SE050 - GPIO usage

SaschaH — Tue, 08 Mar 2022 08:54:45 GMT

Hello Kan,

thanks for the quick reply. Unfortunately I would use the GPIO as an input :-/. But I look into the AN for more informations.

Have a nice day

Sascha